structural evolution

struhk-cher-uh l] adjective: having and manifesting a clearly defined structure or organization socially the pattern of relationships noun: the relationship or organization of the component parts in a work of art or literature. [ev-uh-loo-shuhn] noun: a process of gradual, peaceful, progressive change or development a motion incomplete in itself, but combining with coordinated motions to produce a single action, as in a machine.